EP0974730A3 - Rotary dag bit - Google Patents

Rotary dag bit Download PDF

Info

Publication number
EP0974730A3
EP0974730A3 EP99305259A EP99305259A EP0974730A3 EP 0974730 A3 EP0974730 A3 EP 0974730A3 EP 99305259 A EP99305259 A EP 99305259A EP 99305259 A EP99305259 A EP 99305259A EP 0974730 A3 EP0974730 A3 EP 0974730A3
Authority
EP
European Patent Office
Prior art keywords
bit
channel
bit body
gauge region
rotary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99305259A
Other languages
German (de)
French (fr)
Other versions
EP0974730B1 (en
EP0974730A2 (en
Inventor
Tom Scott Roberts
Clive Jarvis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ReedHycalog UK Ltd
Original Assignee
Camco International UK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Camco International UK Ltd filed Critical Camco International UK Ltd
Publication of EP0974730A2 publication Critical patent/EP0974730A2/en
Publication of EP0974730A3 publication Critical patent/EP0974730A3/en
Application granted granted Critical
Publication of EP0974730B1 publication Critical patent/EP0974730B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
    • E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/602—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1092—Gauge section of drill bits

Abstract

A rotary drill bit, for example as shown in Figure 1, comprises a bit body (10). A plurality of cutting elements are mounted on the bit body (10). A plurality of fluid channels (16, 18) extend outwardly away from the axis of the bit towards a gauge region. At least one of the channels (16, 18) is provided, at its outer end, in the gauge region, with a junk slot (34). The junk slot (34) extends across only part of the width of the channel. A bearing surface (38) also extends across part of the width of the channel and bears against a wall of the borehole being drilled. Inwardly of a gauge region an opening (40) is provided in the channel, the opening leading into an enclosed passage (42) which passes through the bit body (10) to an outlet.
EP99305259A 1998-07-22 1999-07-02 Rotary dag bit Expired - Lifetime EP0974730B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9815843A GB2339811B (en) 1998-07-22 1998-07-22 Improvements in or relating to rotary drill bits
GB9815843 1998-07-22

Publications (3)

Publication Number Publication Date
EP0974730A2 EP0974730A2 (en) 2000-01-26
EP0974730A3 true EP0974730A3 (en) 2000-08-02
EP0974730B1 EP0974730B1 (en) 2004-09-22

Family

ID=10835887

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99305259A Expired - Lifetime EP0974730B1 (en) 1998-07-22 1999-07-02 Rotary dag bit

Country Status (4)

Country Link
US (1) US6129161A (en)
EP (1) EP0974730B1 (en)
DE (1) DE69920345T2 (en)
GB (1) GB2339811B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE524046C2 (en) 1999-09-24 2004-06-22 Varel Internat Inc Rotary drill bit
US6568492B2 (en) 2001-03-02 2003-05-27 Varel International, Inc. Drag-type casing mill/drill bit
WO2007068866A1 (en) * 2005-12-16 2007-06-21 Statoilhydro Asa Drag bit
US8869919B2 (en) * 2007-09-06 2014-10-28 Smith International, Inc. Drag bit with utility blades
US7926596B2 (en) * 2007-09-06 2011-04-19 Smith International, Inc. Drag bit with utility blades
US20090084607A1 (en) * 2007-10-01 2009-04-02 Ernst Stephen J Drill bits and tools for subterranean drilling
US20090084606A1 (en) * 2007-10-01 2009-04-02 Doster Michael L Drill bits and tools for subterranean drilling
BE1018585A3 (en) * 2009-07-06 2011-04-05 Dredging Int CUTTING HEAD FOR DAGGING GROUND, CUTTING DRAINER PROVIDED WITH SUCH CUTTING HEAD, AND USE OF THE CUTTING HEAD FOR Dredging Ground.
US8517124B2 (en) * 2009-12-01 2013-08-27 Northbasin Energy Services Inc. PDC drill bit with flute design for better bit cleaning
US8505634B2 (en) * 2009-12-28 2013-08-13 Baker Hughes Incorporated Earth-boring tools having differing cutting elements on a blade and related methods
CA2788816C (en) * 2010-02-05 2015-11-24 Baker Hughes Incorporated Shaped cutting elements on drill bits and other earth-boring tools, and methods of forming same
US8851207B2 (en) 2011-05-05 2014-10-07 Baker Hughes Incorporated Earth-boring tools and methods of forming such earth-boring tools
SA111320671B1 (en) 2010-08-06 2015-01-22 بيكر هوغيس انكور Shaped cutting elements for earth boring tools, earth boring tools including such cutting elements, and related methods
CA2864187C (en) 2012-02-08 2017-03-21 Baker Hughes Incorporated Shaped cutting elements for earth-boring tools and earth-boring tools including such cutting elements
WO2014055287A1 (en) * 2012-10-02 2014-04-10 Varel International Ind., L.P. Flow through gauge for drill bit
BR112017002655B1 (en) * 2014-08-13 2022-06-14 National Oilwell DHT, L.P. DRILLING DRILL
BR112017011643A2 (en) * 2015-02-09 2018-03-06 Halliburton Energy Services Inc downhole octg centerer, downhole apparatus and capsule for dispensing a downhole article
US10519721B2 (en) 2015-04-27 2019-12-31 Halliburton Energy Services, Inc. Nested bearing and seal for roller cone drill bit
CN113107373B (en) * 2021-04-21 2022-04-08 西南石油大学 Streamlined PDC drill bit capable of improving rock carrying capacity and design method thereof
CN113107375B (en) * 2021-04-27 2024-03-19 中石化江钻石油机械有限公司 High-stability hybrid drill bit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4440247A (en) * 1982-04-29 1984-04-03 Sartor Raymond W Rotary earth drilling bit
US4733735A (en) * 1985-10-01 1988-03-29 Nl Petroleum Products Limited Rotary drill bits
GB2294070A (en) * 1994-10-15 1996-04-17 Camco Drilling Group Ltd Rotary drill bit with enclosed fluid passage
GB2312007A (en) * 1996-04-12 1997-10-15 Baker Hughes Inc Drilling structure with enhanced hydraulic flow characteristics

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0707132B1 (en) * 1994-10-15 2003-08-06 Camco Drilling Group Limited Rotary drill bit
US5904213A (en) * 1995-10-10 1999-05-18 Camco International (Uk) Limited Rotary drill bits

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4440247A (en) * 1982-04-29 1984-04-03 Sartor Raymond W Rotary earth drilling bit
US4733735A (en) * 1985-10-01 1988-03-29 Nl Petroleum Products Limited Rotary drill bits
GB2294070A (en) * 1994-10-15 1996-04-17 Camco Drilling Group Ltd Rotary drill bit with enclosed fluid passage
GB2312007A (en) * 1996-04-12 1997-10-15 Baker Hughes Inc Drilling structure with enhanced hydraulic flow characteristics

Also Published As

Publication number Publication date
EP0974730B1 (en) 2004-09-22
GB2339811B (en) 2002-05-22
GB9815843D0 (en) 1998-09-16
EP0974730A2 (en) 2000-01-26
DE69920345T2 (en) 2006-02-16
GB2339811A (en) 2000-02-09
US6129161A (en) 2000-10-10
DE69920345D1 (en) 2004-10-28

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